istobal Twash 4TA6000, Гражданские и монтажные работы

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9
GB
CIVIL WORK AND INST
ALLA
TION
BUILDING SPECIFICATIONS
2
2.5. Concrete specifications
The slab concrete's corrosion exposure class is “IIa” (normal reinforcement for high moisture conditions). It is
adequate for areas that are not by the sea. For other types of exposure, check regulations in force.
Concerning exposure relating to concrete degradation phenomena other than corrosion, the concrete is ero-
sion-classed, “E”.
If the area were affected by frost, no melting salts would be needed for the foreseen purpose. Designation
would be “H” (frost exposure, no salt de-icing).
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Definition
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with compression HM-30 / B / 20 / IIa+E
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with frost risk: HM-30 / B / 20 / E+H
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Water/cement rate
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(Table 37.3.2.a EHE-08)
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Below 0.50 (Exposure class E)
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Minimum concrete strength
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(Table 37.3.2.b EHE-08)
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30 N/mm2
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Cement
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Portland cement EN 197-1 CEM I 32.5 N (APPENDIX
4. Tables A.4.2 and A.4.5 CE Marking EHE-08
and Appendix I RD 956/2008 RC-08)
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(Table 37.3.2.a EHE-08)
- Minimum content 325 kg/m3. (Do not exceed maximum
cement content 375kg/m3.
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Consistency
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Concrete slump test, base 6 to 9 cm.
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(Art. 31.5 EHE-08) Consistency SOFT
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Coating
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(Art. 37.2.4.1 EHE-08)
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Without blinding concrete, minimum nominal coating
80 mm.
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With blinding concrete, nominal coating 4mm.
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Curing
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(Art. 37.3.7 EHE-08)
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Prolonged curing, at least 50% above normal, that is,
10 days approximately in normal conditions.